Metallic structure.



L. s. IACHMAN.

METALLIC STRUCTURE.

APPLICATION FILED MAY 8,19I6. 1,0@?4@n 7 Patented Apr. 15,1919.

2 SHEETS-SHEET].

l/WE/VTOR Laura/1 c QSTLMAHW BY Wm L. S. LACHMAN.

METALUC STRUCTURE.

APPLICATION FILED MAY 8. I916.

Patented Apr/15, 1919.

2 SHEETS-SHEET 2- l/VVEA/TUR I L0 FE-I166 4La/u110r1 ATTORNEYS LAURENCE S. LACHMAN, OF NEW YORK, N. Y., ASSIGNOR T0 UNIVERSAL ELECTRIC WELDING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

METALLIC STRUCTURE.

ame.

ll l 5 9 Application filed May 8,1916. Serial No. 96,021,

To all whom it may concern Be it known that I, LAURENCE S. LACH- MAN, a citizen of-theUnited States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Metallic Structures, of which the following is a specification.

This invention relates to metallic truss structures for use as girders, frames or other purposes for which the structures may be employed.

The object of the invention is to provide a strong, simple structure of intersecting metallic members which can be quickly and cheaply assembled and joined together.

The invention consists in the improved metal structure hereinafter more particularly described and then specified in the claims.

In the accompanying drawings, Figure 1 is a front elevation of a structure or frame constructed in accordance with this inventlon.

Fig. 2 is an end elevation of the same.

Fig. 3 is a front elevation of a modified form of structurein accordance with this invention.

Fig. 4 is an end elevation of the same.

Fig. 5 is a plan view or transverse section through a pole or column constructed by using the frame illustrated in Fig. 3 as side members.

Fig. 6 is a side elevation on a reduced scale of the column illustrated in Fig. 5.

Fig. 7 is a front elevation of a structure illustrating a further modification of the invention and Fig. 8 is a transverse vertical section through the same.

Referring particularly to Figs. 1 and 2 of the drawings, 1 indicates a zigzag metallic member preferably formed continuous from end to end and of any desired width, the metal strip from which the member is formed being bent at the desired places so that adjoining legs will form any desired angle with each other.

The said member 1 is held between pairs of longitudinal members 2, 2 and 3, 3 each pair engaging opposite edges of the middle member 1 near the corners or turns of the zigzag arrangement. By preference the longitudinal bars 2, 2, 3 and 3 are angle or V-shaped in cross-section and placed in contact with the edges of the zigzag member 1 by engaging said edges by both free edges along the open side of the V-shaped bars whereby each bar intersects the edge of the member 1 at two places.

In this position the parts are secured together preferably by electrically welding them at the points of intersection, a weld being formed at each of the points 4. The edges bite or sink into each other slightly at these points due to the softening of the metal and the application of pressure in the welding operation. By this construction four welds are formed between each pair of longitudinal bars and the middle member whereby a very strong integrally united truss structure is obtained.

Referring to Figs. 3, 4, 5 and 6, the longitudinalbars 5, 6 contact with the corners or turns of the zigzag member 1 and are welded thereto at such points of intersection. In this case the longitudinal bars which are preferably V-shaped straddle the corners or turns of the zigzag members, the edges of the members contacting with the surface or edge of the V bars. At these contacting points indicated at 7 the parts are electrically welded together, two welds being formed at each corner or turn with each bar.

A column or pole may be readily constructed of members formed as shown in Figs. 3 and 4 by arranging the structure upright as illustrated in Fig. 6 and bring ing the face of one of the flanges of the V- shaped bar into fiat contact with a flange of the bar of another unit as indicated at 8 in Fig. 5. The meeting flanges of the bars 5 and 6 may then be secured together in any desired manner along the meeting surfaces, as by rivets or bolts 9 in the spaces between the legs of the members 1 or by spot welding the bars at such places or otherwise.

Referring to the form illustrated in Figs. 7 and 8, the-V-shaped longitudinal bars 5 and 6 engage the corners or turns of the zigzag member 1 by their apexes so that but one point of contact is made between the bars and each turn or corner. At the contacting points the members are electrically welded to each other. the apex of the V bars sinking into the metal at the turn of the zigzag memher and said member spreadin out along the sides of the V bars as indicated more clearly at 10 in Fig. 8.

It will be mulerstood that the invention is not limited to'tlle shape or disposition of the parts as described except as may be specified in the appended claims.

What I claim as my invention is 1. A metallic structure comprising a zigzag middle member and a pair of flanged longitudinal members spaced apart by said middle member with the flanges thereof engaging and intersecting the edges of the middle member and welded thereto.

2. A metal structure comprising a zigzag middle member and a pair of V-shaped longitudinal bars spaced apart by said middle member with the free edges intersecting the edges of the middle member near the turns thereof, said bars being welded to the 15 middle member at the intersecting points, thereby forming four welds between each bar and the middle member.

Signed at New York, in the county of New York and State of New York this 17th 20 day of January, A D. 1916.

LAURENCE S. LACHM'AN.

Witnesses:

F. B. TowNsENn, IRENE Lnmowrrz. 

